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Nematicliquid crystal order reconstruction in ultraconfinement, from density-functional theory

2016-09Journal article Restricted access
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dc.contributor.authorTeixeira, Paulo
dc.date.accessioned2017-07-27T11:20:32Z
dc.date.available2017-07-27T11:20:32Z
dc.date.issued2016-09
dc.description.abstractI use the Onsager approximation of density-functional theory with a simple Parsons-Lee re-scaling to study a hybrid-aligned liquid crystal under very strong confinement. The system is modelled as a film of hard Gaussian overlap particles in a slit geometry, where anchoring is planar at one wall and homeotropic at the other. As the film density is increased from the isotropic phase, a planar-disordered layer grows from the planar-anchoring wall, and a homeotropic layer from the homeotropic-anchoring wall. For film thicknesses between 2 and 7 particle lengths, the degree of overall nematic order as measured by the spatial average of TrQ(2) (where Q is the nematic order parameter tensor) is a continuously increasing function of the density, with a pronounced rise around the bulk isotropic-nematic transition. This rise is steeper the thicker the film, and is preceded by a large amount of biaxiality growing from the planar-anchoring wall. Deeper into the nematic phase, most of the film is either planar or homeotropic, but some biaxiality persists in a region of otherwise reduced overall nematic order whose position varies with film thickness.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationTEIXEIRA, P.I.C. - Nematicliquid crystal order reconstruction in ultraconfinement, from density-functional theory. Liquid Crystals. ISSN 0267-8292. Vol. 43, N.º 11 (2016), pp. 1526-1535pt_PT
dc.identifier.doi10.1080/02678292.2016.1185672pt_PT
dc.identifier.issn0267-8292
dc.identifier.urihttp://hdl.handle.net/10400.21/7314
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherTaylor & Francispt_PT
dc.relation.publisherversionhttp://www.tandfonline.com/doi/pdf/10.1080/02678292.2016.1185672?needAccess=truept_PT
dc.titleNematicliquid crystal order reconstruction in ultraconfinement, from density-functional theorypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1535pt_PT
oaire.citation.issue11pt_PT
oaire.citation.startPage1526pt_PT
oaire.citation.titleLiquid Crystalspt_PT
oaire.citation.volume43pt_PT
person.familyNameTeixeira
person.givenNamePaulo
person.identifier.ciencia-idB31A-0CBD-8AC4
person.identifier.orcid0000-0003-2315-2261
person.identifier.ridA-2682-2009
person.identifier.scopus-author-id7005895098
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication35a012c6-2e8b-402f-9b82-065843fce9aa
relation.isAuthorOfPublication.latestForDiscovery35a012c6-2e8b-402f-9b82-065843fce9aa

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